Starbucks– UBS upgraded the coffee chain to "buy" from "neutral", citing an attractive valuation and an increased conviction about its growth being sustainable.

BlackBerry–The smartphone maker posted a smaller than expected loss of 11 cents per share, compared to forecasts of 26 cents, with revenue topping estimates. The company said its cash position is strong, and that it recognized revenue on 1.6 million devices during the quarter compared to 1.3 million in the prior quarter.

Jabil Circuit–The contract electronics manufacturer lost six cents per share for the third quarter, excluding certain items, but that loss was three cents narrower than consensus estimates. Revenue was above analyst forecasts, but it was down for the comparable year-ago period.

AutoZone–The auto parts retailer announced an addition of $750 million to its ongoing share repurchase program.

T-Mobile US–The wireless carrier will offer a free one-week trial in an attempt to lure new customers.

United Technologies– UTX ended a long dispute between Canada and its Sikorsky Aircraft unit, striking a deal for 28 helicopters that were originally to have been delivered in 2012. The two sides had been in dispute over a variety of issues.

ConAgra–Bank of America/Merrill Lynch downgraded the food company's stock to "underperform" from "buy," a two-notch downgrade, after ConAgra cut its earnings outlook Wednesday.

Nvidia–BofA/Merrill downgraded the chip maker's stock to "underperform" from "neutral", citing margins which are at a peak and a rich valuation.